X86, AArch64, ARM: Do not attach debug location to spill/reload instructions

This rebases and recommits r343520. hwasan should be fixed now and this
shouldn't break the tests anymore.

Spill/reload instructions are artificially generated by the compiler and
have no relation to the original source code. So the best thing to do is
not attach any debug location to them (instead of just taking the next
debug location we find on following instructions).

Differential Revision: https://reviews.llvm.org/D52125

llvm-svn: 343895

3 files changed, 19 insertions, 27 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
index 3bc3a3abe35..b13f0412e92 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -2771,9 +2771,6 @@ void AArch64InstrInfo::storeRegToStackSlot(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, unsigned SrcReg,
     bool isKill, int FI, const TargetRegisterClass *RC,
     const TargetRegisterInfo *TRI) const {
-  DebugLoc DL;
-  if (MBBI != MBB.end())
-    DL = MBBI->getDebugLoc();
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   unsigned Align = MFI.getObjectAlignment(FI);
@@ -2867,7 +2864,7 @@ void AArch64InstrInfo::storeRegToStackSlot(
   }
   assert(Opc && "Unknown register class");
 
-  const MachineInstrBuilder MI = BuildMI(MBB, MBBI, DL, get(Opc))
+  const MachineInstrBuilder MI = BuildMI(MBB, MBBI, DebugLoc(), get(Opc))
                                      .addReg(SrcReg, getKillRegState(isKill))
                                      .addFrameIndex(FI);
 
@@ -2905,9 +2902,6 @@ void AArch64InstrInfo::loadRegFromStackSlot(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, unsigned DestReg,
     int FI, const TargetRegisterClass *RC,
     const TargetRegisterInfo *TRI) const {
-  DebugLoc DL;
-  if (MBBI != MBB.end())
-    DL = MBBI->getDebugLoc();
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   unsigned Align = MFI.getObjectAlignment(FI);
@@ -3001,7 +2995,7 @@ void AArch64InstrInfo::loadRegFromStackSlot(
   }
   assert(Opc && "Unknown register class");
 
-  const MachineInstrBuilder MI = BuildMI(MBB, MBBI, DL, get(Opc))
+  const MachineInstrBuilder MI = BuildMI(MBB, MBBI, DebugLoc(), get(Opc))
                                      .addReg(DestReg, getDefRegState(true))
                                      .addFrameIndex(FI);
   if (Offset)
diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 2ee8f9604e0..ac7d656efb6 100644
--- a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -971,8 +971,6 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                     unsigned SrcReg, bool isKill, int FI,
                     const TargetRegisterClass *RC,
                     const TargetRegisterInfo *TRI) const {
-  DebugLoc DL;
-  if (I != MBB.end()) DL = I->getDebugLoc();
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   unsigned Align = MFI.getObjectAlignment(FI);
@@ -984,7 +982,7 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
   switch (TRI->getSpillSize(*RC)) {
     case 2:
       if (ARM::HPRRegClass.hasSubClassEq(RC)) {
-        BuildMI(MBB, I, DL, get(ARM::VSTRH))
+        BuildMI(MBB, I, DebugLoc(), get(ARM::VSTRH))
             .addReg(SrcReg, getKillRegState(isKill))
             .addFrameIndex(FI)
             .addImm(0)
@@ -995,14 +993,14 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
       break;
     case 4:
       if (ARM::GPRRegClass.hasSubClassEq(RC)) {
-        BuildMI(MBB, I, DL, get(ARM::STRi12))
+        BuildMI(MBB, I, DebugLoc(), get(ARM::STRi12))
             .addReg(SrcReg, getKillRegState(isKill))
             .addFrameIndex(FI)
             .addImm(0)
             .addMemOperand(MMO)
             .add(predOps(ARMCC::AL));
       } else if (ARM::SPRRegClass.hasSubClassEq(RC)) {
-        BuildMI(MBB, I, DL, get(ARM::VSTRS))
+        BuildMI(MBB, I, DebugLoc(), get(ARM::VSTRS))
             .addReg(SrcReg, getKillRegState(isKill))
             .addFrameIndex(FI)
             .addImm(0)
@@ -1013,7 +1011,7 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
       break;
     case 8:
       if (ARM::DPRRegClass.hasSubClassEq(RC)) {
-        BuildMI(MBB, I, DL, get(ARM::VSTRD))
+        BuildMI(MBB, I, DebugLoc(), get(ARM::VSTRD))
             .addReg(SrcReg, getKillRegState(isKill))
             .addFrameIndex(FI)
             .addImm(0)
@@ -1021,7 +1019,7 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
             .add(predOps(ARMCC::AL));
       } else if (ARM::GPRPairRegClass.hasSubClassEq(RC)) {
         if (Subtarget.hasV5TEOps()) {
-          MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(ARM::STRD));
+          MachineInstrBuilder MIB = BuildMI(MBB, I, DebugLoc(), get(ARM::STRD));
           AddDReg(MIB, SrcReg, ARM::gsub_0, getKillRegState(isKill), TRI);
           AddDReg(MIB, SrcReg, ARM::gsub_1, 0, TRI);
           MIB.addFrameIndex(FI).addReg(0).addImm(0).addMemOperand(MMO)
@@ -1029,7 +1027,7 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
         } else {
           // Fallback to STM instruction, which has existed since the dawn of
           // time.
-          MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(ARM::STMIA))
+          MachineInstrBuilder MIB = BuildMI(MBB, I, DebugLoc(), get(ARM::STMIA))
                                         .addFrameIndex(FI)
                                         .addMemOperand(MMO)
                                         .add(predOps(ARMCC::AL));
@@ -1043,14 +1041,14 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
       if (ARM::DPairRegClass.hasSubClassEq(RC)) {
         // Use aligned spills if the stack can be realigned.
         if (Align >= 16 && getRegisterInfo().canRealignStack(MF)) {
-          BuildMI(MBB, I, DL, get(ARM::VST1q64))
+          BuildMI(MBB, I, DebugLoc(), get(ARM::VST1q64))
               .addFrameIndex(FI)
               .addImm(16)
               .addReg(SrcReg, getKillRegState(isKill))
               .addMemOperand(MMO)
               .add(predOps(ARMCC::AL));
         } else {
-          BuildMI(MBB, I, DL, get(ARM::VSTMQIA))
+          BuildMI(MBB, I, DebugLoc(), get(ARM::VSTMQIA))
               .addReg(SrcReg, getKillRegState(isKill))
               .addFrameIndex(FI)
               .addMemOperand(MMO)
@@ -1063,14 +1061,15 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
       if (ARM::DTripleRegClass.hasSubClassEq(RC)) {
         // Use aligned spills if the stack can be realigned.
         if (Align >= 16 && getRegisterInfo().canRealignStack(MF)) {
-          BuildMI(MBB, I, DL, get(ARM::VST1d64TPseudo))
+          BuildMI(MBB, I, DebugLoc(), get(ARM::VST1d64TPseudo))
               .addFrameIndex(FI)
               .addImm(16)
               .addReg(SrcReg, getKillRegState(isKill))
               .addMemOperand(MMO)
               .add(predOps(ARMCC::AL));
         } else {
-          MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(ARM::VSTMDIA))
+          MachineInstrBuilder MIB = BuildMI(MBB, I, DebugLoc(),
+                                            get(ARM::VSTMDIA))
                                         .addFrameIndex(FI)
                                         .add(predOps(ARMCC::AL))
                                         .addMemOperand(MMO);
@@ -1086,14 +1085,15 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
         if (Align >= 16 && getRegisterInfo().canRealignStack(MF)) {
           // FIXME: It's possible to only store part of the QQ register if the
           // spilled def has a sub-register index.
-          BuildMI(MBB, I, DL, get(ARM::VST1d64QPseudo))
+          BuildMI(MBB, I, DebugLoc(), get(ARM::VST1d64QPseudo))
               .addFrameIndex(FI)
               .addImm(16)
               .addReg(SrcReg, getKillRegState(isKill))
               .addMemOperand(MMO)
               .add(predOps(ARMCC::AL));
         } else {
-          MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(ARM::VSTMDIA))
+          MachineInstrBuilder MIB = BuildMI(MBB, I, DebugLoc(),
+                                            get(ARM::VSTMDIA))
                                         .addFrameIndex(FI)
                                         .add(predOps(ARMCC::AL))
                                         .addMemOperand(MMO);
@@ -1107,7 +1107,7 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
       break;
     case 64:
       if (ARM::QQQQPRRegClass.hasSubClassEq(RC)) {
-        MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(ARM::VSTMDIA))
+        MachineInstrBuilder MIB = BuildMI(MBB, I, DebugLoc(), get(ARM::VSTMDIA))
                                       .addFrameIndex(FI)
                                       .add(predOps(ARMCC::AL))
                                       .addMemOperand(MMO);
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
index f69f6eff4d2..36ef7dca1f3 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.cpp
+++ b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -3313,8 +3313,7 @@ void X86InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
       (Subtarget.getFrameLowering()->getStackAlignment() >= Alignment) ||
       RI.canRealignStack(MF);
   unsigned Opc = getStoreRegOpcode(SrcReg, RC, isAligned, Subtarget);
-  DebugLoc DL = MBB.findDebugLoc(MI);
-  addFrameReference(BuildMI(MBB, MI, DL, get(Opc)), FrameIdx)
+  addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc)), FrameIdx)
     .addReg(SrcReg, getKillRegState(isKill));
 }
 
@@ -3348,8 +3347,7 @@ void X86InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
       (Subtarget.getFrameLowering()->getStackAlignment() >= Alignment) ||
       RI.canRealignStack(MF);
   unsigned Opc = getLoadRegOpcode(DestReg, RC, isAligned, Subtarget);
-  DebugLoc DL = MBB.findDebugLoc(MI);
-  addFrameReference(BuildMI(MBB, MI, DL, get(Opc), DestReg), FrameIdx);
+  addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc), DestReg), FrameIdx);
 }
 
 void X86InstrInfo::loadRegFromAddr(